BRA STRAP: it's just a normal innerwear, no need to feel awkward if it's seen.

Strangers passing: Hey look her bra strap is seen, and you notice them they are staring at you
So you can ask them you also need one comes I will get you you can also enjoy wearing.

Anyhow it's just a Bra strap, a piece of cloth of inner wear, it's just a...